One-particle spectral function and analytic continuation for many-body implementation in the exact muffin-tin orbitals method

A. Östlin,1,* L. Chioncel,2,3 and L. Vitos1,4,5 1Department of Materials Science and Engineering, Applied Materials Physics, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden 2Augsburg Center for Innovative Technologies, University of Augsburg, D-86135 Augsburg, Germany 3Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, D-86135 Augsburg, Germany 4Department of Physics and Astronomy, Division of Materials Theory, Uppsala University, Box 516, SE-751210 Uppsala, Sweden 5Research Institute for Solid State Physics and Optics, Wigner Research Center for Physics, Budapest H-1525, P.O. Box 49, Hungary (Received 11 October 2012; published 6 December 2012)